Question

Solve the inequality.


20 < k + 19

Answer 1

Solution:

Simplify the inequality and solve.

• 20 < k + 19
• => 20 - 19 < k
• => 1 < k

The simplified inequality is 1 < k.

Answer 2

$\sf20 < k + 19$

Move the variable to the left-hand side and change its sign

$\sf20 - k < 19$

Move the constant to the right-hand side and change its sign

$\sf \: - k < 19 - 20$

Calculate the difference

$\sf \: - k < - 1$

Change the signs on both sides of the inequality and flip the inequality sign

$\boxed{ \tt \: k > 1}$